The National Mapping and Resource Information Authority (NAMRIA) has clarified the role of official Philippine maps and nautical charts in showing the country’s maritime jurisdiction in the West Philippine Sea, amid public discussions on maritime boundaries.

NAMRIA emphasized that "since 2012, the Philippines has formally used the name West Philippine Sea in government publications" and that the label is applied consistently across administrative, topographic, thematic, and nautical charts.

These maps serve as reference tools for mariners, planners, researchers, and institutions for navigation, geographic information, and safety at sea.

Regarding the Exclusive Economic Zone (EEZ), NAMRIA explained that it extends up to 200 nautical miles from the archipelagic baselines, forming a continuous curved boundary rather than straight-line coordinates.

“A short list of coordinates would not accurately describe the maritime limit,” the agency said, noting that geospatial data based on RA 9522 ensures accurate mapping for navigation systems.

The agency also highlighted that its nautical charts follow international hydrographic standards and are used by both Philippine and foreign vessels. Charts are submitted to global technical bodies, including the International Hydrographic Organization, integrating Philippine geographic information into the global maritime record and supporting safe navigation.

NAMRIA concluded by reaffirming its commitment to national sovereignty and maritime safety.

“By maintaining scientifically correct maps and internationally compliant nautical charts, [NAMRIA] contributes to maritime safety, environmental management, disaster preparedness, and proper documentation of national territory,” the agency said, vowing to continue upholding this mandate.